Stink bombs, water balloons, potato guns and water pistols have been banned from this year's Easter show bags because they have been deemed too unsafe.

Agriculture shows across NSW have been given a list of prohibited items that can't be sold in show bags by the Federal Council of Agricultural Societies.

Among the banned items are water pistols over 150mm, 'lurid' playing cards, fart gas, pressure pack snow and silly string.

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Agriculture shows across NSW have been given a list of prohibited items that can't be sold in show bags this year including stink bombs, water balloons, potato guns and water pistols

Liberal Democrat Senator David Leyonhjelm has labelled those behind the bans as the 'fun police'.

'It is a dark day, the fun police are on the loose,' Mr Leyonhjelm told Nine's Today Show.

'There's actually a serious side to this. These people are intruding on the relationship between parents and their kids. They are assuming that none of us are smart enough to use common sense. It's getting past a joke.'

Other more serious items included on the banned list include drug related goods, fireworks, fake cigarettes, laser pointers and martial art nunchakas.

Stink bombs are among the items banned from show bags at this year's agriculture shows across NSW

Potato guns have been deemed unsafe because it could 'shoot another kid in the eye', according to NSW Agricultural Societies Council president Tim O'Brien

Water balloons have also made the list of prohibited items, which have all been banned due to past issues

NSW Agricultural Societies Council president Tim O'Brien has defended the list saying most were banned for 'safety reasons', the Daily Telegraph reports.

'(Potato guns) could shoot another kid in the eye,' Mr O'Brien said.

'(Throw-down crackers) could scare a horse.'

He said all banned items would have caused some sort of an issue in the past.

The banned items will not apply to the Sydney Royal Easter Show but all show bags are being checked for unsafe toys.

The agreed list of banned items was reportedly put together with input from the Showmen's Guild of Australasia and the NSW Fair Trading regulation.

Agriculture shows across NSW have been given a list of prohibited items that can't be sold in show bags by the Federal Council of Agricultural Societies

Liberal Democrat Senator David Leyonhjelm has labelled those behind the bans as the 'fun police'